加锁 同(tóng )时队(duì )列可以(yǐ )无限(xiàn )长吗 什么(me )时候消减,同时(shí )采用(yòng )了弱引用避(bì )免队列过大(dà ),造成gc压力(lì ) 源码如下(xià )get recycle scavenge每次(cì )都是(shì )从head节点(diǎn )获取(qǔ ),如(rú )果获(huò )取(qǔ )不到(dào )就next,这些队列并不删除,jvm会自动在内存(cún )不(bú )够(gòu )的时候删除
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